Question

Encontre as raizes dada a equação
$y = {x}^{2} - 4x + 8$
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Answer 1

y = x² - 4x + 8

As raízes são dadas quando y = 0

y = 0

x² - 4x + 8 = 0

x² - 4x + 4 = -4

(x - 2)² = -4

x - 2 = ±√-4

x = 2 ± 2i

x ∉ R